Rear lower bumper



FIG. 1 is a perspective view of a rear lower bumper showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof, a right side view being a mirror image thereof and,

FIG. 4 is a top view thereof. 

CLAIM The ornamental design for a rear lower bumper, as shown and described. 